package cn.tedu._06article.base.filters;

import cn.tedu._06article.pojo.vo.UserVO;
import jakarta.servlet.*;
import jakarta.servlet.annotation.WebFilter;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;

@Slf4j
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/v1/vehicle/*")
public class LoginCheckFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        log.debug("过滤器初始化！！！");
    }

    @Override
    // 过滤器核心方法
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        log.debug("进入登录状态校验的过滤器！！！");
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        HttpSession session = request.getSession();
        UserVO userVO = (UserVO) session.getAttribute("user");
        if (userVO == null) {
            log.debug("用户未登录！！！");
            response.sendRedirect("/login.html");
            // 用户没有登录，不允许访问
            // 跳转到登录页面
        }else {
            // 用户已经登录，允许访问
            log.debug("用户已经登录，允许访问");
            // 放行
            filterChain.doFilter(request, response);
        }
    }

    @Override
    public void destroy() {
        log.debug("过滤器销毁！！！");
    }
}
